1 piece compact version adapter for 6-30 plug charge from 10-30 240V outlet. Molded with electroplated copper terminal in order to avoid surface oxidation effectively. Dryer 30 AMP 3 prong NEMA 10-30 250V 3-prong male plug. Industrial 3-prong 30 amp 250 volt 6-30 female. Used 10AWG conductor inner wire, support max 30 AMP loading. Heavy-duty 100% copper wire conductor inside.